题目内容
(3
+4.5-1
)÷6
.
| 5 |
| 6 |
| 3 |
| 4 |
| 7 |
| 12 |
分析:先把小括号里面的带分数化简成一共整数加上一个分数的形式,然后运用加法结合律简算,最后算括号外的除法.
解答:解:(3
+4.5-1
)÷6
,
=[(3+
)+(4+
)-(1+
)]÷6
,
=[(3+4-1)+(
+
-
)]÷6
,
=[6+
]÷6
,
=6
÷6
,
=1.
| 5 |
| 6 |
| 3 |
| 4 |
| 7 |
| 12 |
=[(3+
| 5 |
| 6 |
| 1 |
| 2 |
| 3 |
| 4 |
| 7 |
| 12 |
=[(3+4-1)+(
| 5 |
| 6 |
| 1 |
| 2 |
| 3 |
| 4 |
| 7 |
| 12 |
=[6+
| 7 |
| 12 |
| 7 |
| 12 |
=6
| 7 |
| 12 |
| 7 |
| 12 |
=1.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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